<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<div id="wrap">
			<span></span>
			<ul>
				<li></li>
				<li></li>
			</ul>
		</div>
		<script src="./DOM树.js"></script>
	</body>
</html>
